A simple bitarray library for nim.
git clone https://github.com/YesDrX/bitarray.git cd bitarray nimble install or
nimble install nimbitarray import bitarray when isMainModule: var a = newBitsArray(70) b = newBitsArray(70) echo " a = ",a echo " b = ",b echo "set bits ..." a.setBits(0,1,2,3,4,69) b.setBits(6,7,8,9,65) echo " a = ",a echo " b = ",b echo "a & b = ", a & b echo "a | b = ", a | b echo "a ^ b = ", a ^ b echo " ~a = ", ~a echo "a.shl(1) =",a.shl(1) echo "a.shl(2) =",a.shl(2) echo "a.shl(3) =",a.shl(3) echo "a.shl(69)=",a.shl(69) echo "a.shr(1) =",a.shr(1) echo "a.shr(2) =",a.shr(2) echo "a.shr(3) =",a.shr(3) echo "a.shr(69)=",a.shr(69) echo "basic types" echo (-7).toBitsArray echo (7).toBitsArray echo (-1.555).toBitsArray echo (1.555).toBitsArray echo (-7.int16).toBitsArray echo (7.int16).toBitsArray a = 0000000000000000000000000000000000000000000000000000000000000000000000 b = 0000000000000000000000000000000000000000000000000000000000000000000000 set bits ... set [0,1,2,3,4,69]-th bit of a a = 1111100000000000000000000000000000000000000000000000000000000000000001 set [6,7,8,9,65]-th bit of a b = 0000001111000000000000000000000000000000000000000000000000000000010000 a & b = 0000000000000000000000000000000000000000000000000000000000000000000000 a | b = 1111101111000000000000000000000000000000000000000000000000000000010001 a ^ b = 1111101111000000000000000000000000000000000000000000000000000000010001 ~a = 0000011111111111111111111111111111111111111111111111111111111111111110 a.shl(1) =1111000000000000000000000000000000000000000000000000000000000000000010 a.shl(2) =1110000000000000000000000000000000000000000000000000000000000000000100 a.shl(3) =1100000000000000000000000000000000000000000000000000000000000000001000 a.shl(69)=1000000000000000000000000000000000000000000000000000000000000000000000 a.shr(1) =0111110000000000000000000000000000000000000000000000000000000000000000 a.shr(2) =0011111000000000000000000000000000000000000000000000000000000000000000 a.shr(3) =0001111100000000000000000000000000000000000000000000000000000000000000 a.shr(69)=0000000000000000000000000000000000000000000000000000000000000000000001 expand a to 100 bits: 1111100000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000 127.uint32.toBitsArray = 11111110000000000000000000000000 127.uint32.toBitsArray.reverseBits = 00000000000000000000000001111111 127.uint32.toBitsArray.reverseBits.reverseBits = 11111110000000000000000000000000 (uint32.high-3).toBitsArray = 00111111111111111111111111111111 (uint32.high-3).toBitsArray.reverseBits = 11111111111111111111111111111100